3 2 z - 5*z + 9*z - 45
z^3 - 5*z^2 + 9*z - 45
3 2 -45 + z - 5*z + 9*z
-45 + z^3 - 5*z^2 + 9*z
(x - 5)*(x + 3*I)*(x - 3*I)
((x - 5)*(x + 3*i))*(x - 3*i)
-45.0 + z^3 + 9.0*z - 5.0*z^2
/ 2\ (-5 + z)*\9 + z /
(-5 + z)*(9 + z^2)
-45 + z*(9 + z*(-5 + z))